Exuctjtob oe the said kennedy doug-am



Aug. 11, 1925. 1,549,655

' K. DOUGAN WHEAT HEATER Filed Jan 27, 1923 Z/Yuewrae,

lam/tar Jul/64w Irruwzr Patented Aug. 11, 1925,

I warren crates KENNEDY DOTJ'GAN, OF MINNEAPOLIS, MINNESOT ii i CEASED.

WHEAT HEATER.

Application filed January 27, 1923. Serial No. 615,396.

To all whom it may concern: 1 7

Be it known that I, KENNEDY DOUGAN, a citizen of the United States, and a resident of Minneapolis, in the county of Hennepin and State of Minnesota, have invented new and useful Improvements in a Wheat Heater, of which the following is a specification.

The main object of this invention is to provide means for insuring the draining of the heater if the millernforgets to open his drain valve. 1

Another object is to provide improved means for automatically draining the coils of the heater without in any way interfering with the ordinary operation of the heater.

lVith these and incidental objects in view, the invention consists of certain novel features of construction and combinations of parts, the essential elements of which are hereinafter described with reference to the drawing which accompanies and forms a part of this specification.

In the drawing, Figure 1 is a side elevation of my improved heater with some pertions removed; Figure 2 is an enlarged side elevation of the automatic control boX with the cover removed; and Figure 8is a side elevation of a modification of my device.

As shown in Figure 1, the heater is com-- posed of a casing 1 in which are contained the ordinary heater coils, but as this invention has nothing to do with the actual operation of the interior of said heater, the interior is neither shown in detail nor described.

The temperature regulator 2 is similar in action to that described in my Patent No. 1,420,916, issued June 27 1922, temperature regulator, but as its action has nothing to do with this particular invention it will not be described or shown in detail.

The throttle 3 is adapted to be connected to a steam boiler and hence admits live steam into the heater coils at 4: and also to the top of the temperature regulator at 5.

The steam passes through the coils of'the heater in the ordinary manner and the outlet therefrom at 6 is connected to the bottomof the temperature regulator at 7, the valve 8 controlling the connection to the pipe 9 only.

An ordinary air and steam relief valve 10 is provided for the main steam connection.

Connected at 11 is a box 12130 which is connected the pipe 13, which at its upper end'has an air and steam relief valve 1 1.

The lever 15 is hinged at 16 in the box 12 and has hinged thereto at 1? the aluminum rod 18, which is adjustably fastened to the upper end of the pipe 13 at 19.

Hinged to the other end of the lever 15 is a link 20 which in turn is hinged at 21 to the lever 22 hinged to the box at 23. Controlled by the free end of the lever 22 is a pin'2t which controls a valve check 25 which in turn co-acts with the check valve seat 26.

The, expansion of the aluminum rod 18 from the action of either steam or hot water is such that through the levers the check 25 is quickly closed so that, except when the heater is cold, this check is always closed, but when the heater becomes cold this check is opened to allow water from the coil to MINNEAFOLIS TRUST COMPANY,

drain out directly through the pipe 27 into the lower part of the temperature regulator 28 and out at 29 from whence it returns to the boiler the cover 13 encloses the exterior of the pipe 13 and apertures 18' admit air from the interior of the casing 1 so to maintain the pipe 13 at substantially the same temperature as the coils on the interior of the casing.

As described in my Patent 21,420,916

- issued June 27,1922 temperature regulator,

the temperature of the heater is regulated by the height of water in the heater coils,

this in turn being controlled by the height of the particular one of the tubes 30 which is connected to the drain.

It is therefore apparent that when there is steam in the heater, the steam pressure at the upper part of the heater is the same as that on the lower part of the heater but the waste water will drain 011 by gravity, this water passing through. the pipe 11 into the temperature regulator up to the top of the particular pipe that is in line with the outlet and thence out through the drain at 29.

The valve 8 is provided for the miller in charge so he may open this valve to drain the heater thereby giving a quicker and larger opening, but the automatic valve insures that the heater will be drained even though the miller does forget to open the valve 8. v

In Figure 1 the invention is shown applied to the simplest type 01" heating coil, to show how it may be applied to radiators or steam coils of any design.

Vi hile l have described my invention and illustrated it in two particular designs, I do not wish it to be understood that 1 limit myself to these constructions, as it is evident the application of the invention may be varied in many ways within the'scope of the following claims.

Claims- 1. In awheat heater, the combination with heater coils and a temperature regulating means controlling the temperature or said coils through the amount oi condensed water therein, of a boiler steam connection tor admitting live steam to the top of said coils and said regulator, a drain leading from the bottom O'i said regulator to said boiler, an upstanding pipe connected to said drain, connection from said up standing pipe to the lower end o1 said heater coils, and a thermostatic valve controlling the connection between the over ad oi said coils and said drain.

2. In a wheat heater, the combination with a heater coil having a temperature regulator, of a fluid connectica: between the upper part of said regulator and said coil, a fluid connection between the lower part 01 said regulator and said coil, a drain for said regulator and positioned below Said last named connection; a steam boiler connection for the upper end of said coil and a return boiler connction for said drain, a drain pipe connecting the lower end of said coil to the lower end of said regulator above the drain thereof, and a thermostatic valve in said connection.

3. In a wheat heater, the combination with a heater coil having a temperature regulator, of a fluid connection between the upper part of said regulator and said coil, a fluid connection between the lower part of said regulator and said coil, a drain for said regulator and positioned below said last named connection; a steam boiler connection "for the upper end of said coil and a return boiler connection for said drain, a drain pipe connecting the lower end of said coil to the lower end of said regulator above the drain thereof, a thermostatic valve in said connection, and a' second drain connection between the lower end of said coil and the lower end of said regulator, said last named connection having a inziznuall controlled shut-oil valve therein.

4-. In a wheat heater, the combination with heater coils and a. temperature regulating means controlling the temperature of said coils through the amount of condensed water therein, of a boiler steam connection for admitting live steam to the top of said coils and said regulator, a drain leading from the bottom of said regulator to said boiler, an upstanding pipe connected to said drain, a connection from said u istanding pipe to the lower end of said heater coils, a thermostatic valve controlling the connection between the lower end otlf said coils and laid drain, and a steam and air reliei check v ren valve in the upper end of said u pipe, a covering for said ups'tandin enclosing it against said casin an tures connecting. the interior or casi with the interior of said covering to allow heated air to pass therethrough.

KENNEDY DOUGAII. 

